HP x4000 - Fan Control; Sense Power State

Hardware Management (Monitoring and Reporting)
Hardware Monitoring
Chapter 5 75
Additional Sensors
The SDR for Processor 0 includes three separate functions:
• presence detect
• IERR
• processor voltage mismatch
Fan Control
Individual fan speed is controlled by the HMC, based on temperature
and configuration information. This allows fans to run slower in most
circumstances, thus making the machine quieter.
Sense Power State
Zircon senses power state using signal pins from the ICH2.
This is used for fan control and indicating power state on the status
LED.
Table 5-4 Additional Sensor Scans
Sensor
#
Sensor ID Signal Sensor
Type
Zircon
Pin
Winbon
d Pin
Description
70h CPU0
PRESENT
SKTOCC_0_L Processor GPIO23 - Processor 0
Presence/Absence
71h CPU1
PRESENT
SKTOCC_1_L Processor GPIO24 - Processor 1
Presence/Absence
72h CPU0IERR IERR# Processor GPIO27 - Processor 0 IERR
73h CPU
MISMATCH
VID_ERROR# Processor GPIO28 - Processor Voltage
Mismatch
80h CHASSIS
OPEN
INTRU# Chassis
Intrusion
- C_OPEN General Chassis
Intrusion
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